DB2Dialect.java |
1 /** 2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved. 3 * 4 * 5 * 6 * 7 * The contents of this file are subject to the terms of the Liferay Enterprise 8 * Subscription License ("License"). You may not use this file except in 9 * compliance with the License. You can obtain a copy of the License by 10 * contacting Liferay, Inc. See the License for the specific language governing 11 * permissions and limitations under the License, including but not limited to 12 * distribution rights of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 23 package com.liferay.portal.dao.orm.hibernate; 24 25 /** 26 * <a href="DB2Dialect.java.html"><b><i>View Source</i></b></a> 27 * 28 * @author Shepherd Ching 29 * @author Jian Cao 30 */ 31 public class DB2Dialect extends org.hibernate.dialect.DB2Dialect { 32 33 public String getLimitString(String sql, boolean hasOffset) { 34 if (!sql.startsWith("(")) { 35 return super.getLimitString(sql, hasOffset); 36 } 37 38 StringBuilder sb = new StringBuilder(); 39 40 sb.append("select cursor1.* from ("); 41 sb.append("select rownumber() over() as rownumber_, cursor2.* from ("); 42 sb.append(sql); 43 sb.append(") as cursor2) as cursor1 where rownumber_"); 44 45 if (hasOffset) { 46 sb.append(" between ? + 1 and ?"); 47 } 48 else { 49 sb.append(" <= ?"); 50 } 51 52 return sb.toString(); 53 } 54 55 }